Ray tracing samples can now also use the UI overlay

General cleanup, changed default settings.overlay value

examples/multiview/multiview.cpp

@@ -63,7 +63,6 @@ public:
 		camera.setRotation(glm::vec3(0.0f, 90.0f, 0.0f));
 		camera.setTranslation(glm::vec3(7.0f, 3.2f, 0.0f));
 		camera.movementSpeed = 5.0f;
-		settings.overlay = true;
 
 		// Enable extension required for multiview
 		enabledDeviceExtensions.push_back(VK_KHR_MULTIVIEW_EXTENSION_NAME);